Which Autolite spark plug would have come in an early 66 gt350 (289 hipo) from San Jose? Doubtful, but did SA change the Ford (Autolite) OE plugs? I’m fairly certain they were the star style plugs but not sure what the heat range was. I’ve seen the star style Autolites in a silver color plug, is that the original style, or would it be black steel coating? How important is an item like a spark plug in Concourse division two?
Thanks very much as always, Karl